| 1 | /*
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| 2 | * NTLMSSP Acceptor
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| 3 | * DCERPC Server functions
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| 4 | * Copyright (C) Simo Sorce 2010.
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| 5 | *
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| 6 | * This program is free software; you can redistribute it and/or modify
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| 7 | * it under the terms of the GNU General Public License as published by
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| 8 | * the Free Software Foundation; either version 3 of the License, or
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| 9 | * (at your option) any later version.
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| 10 | *
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| 11 | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>.
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| 18 | */
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| 19 |
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| 20 |
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| 21 | #include "includes.h"
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| 22 | #include "rpc_server/dcesrv_ntlmssp.h"
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| 23 | #include "../libcli/auth/ntlmssp.h"
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| 24 | #include "ntlmssp_wrap.h"
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| 25 | #include "auth.h"
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| 26 |
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| 27 | NTSTATUS ntlmssp_server_auth_start(TALLOC_CTX *mem_ctx,
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| 28 | bool do_sign,
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| 29 | bool do_seal,
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| 30 | bool is_dcerpc,
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| 31 | DATA_BLOB *token_in,
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| 32 | DATA_BLOB *token_out,
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| 33 | struct auth_ntlmssp_state **ctx)
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| 34 | {
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| 35 | struct auth_ntlmssp_state *a = NULL;
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| 36 | NTSTATUS status;
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| 37 |
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| 38 | status = auth_ntlmssp_start(&a);
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| 39 | if (!NT_STATUS_IS_OK(status)) {
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| 40 | DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
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| 41 | nt_errstr(status)));
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| 42 | return status;
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| 43 | }
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| 44 |
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| 45 | /* Clear flags, then set them according to requested flags */
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| 46 | auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
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| 47 | NTLMSSP_NEGOTIATE_SEAL));
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| 48 |
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| 49 | if (do_sign) {
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| 50 | auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN);
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| 51 | }
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| 52 | if (do_seal) {
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| 53 | /* Always implies both sign and seal for ntlmssp */
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| 54 | auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN |
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| 55 | NTLMSSP_NEGOTIATE_SEAL);
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| 56 | }
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| 57 |
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| 58 | status = auth_ntlmssp_update(a, *token_in, token_out);
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| 59 | if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
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| 60 | DEBUG(0, (__location__ ": auth_ntlmssp_update failed: %s\n",
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| 61 | nt_errstr(status)));
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| 62 | goto done;
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| 63 | }
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| 64 |
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| 65 | /* Make sure data is bound to the memctx, to be freed the caller */
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| 66 | talloc_steal(mem_ctx, token_out->data);
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| 67 | /* steal ntlmssp context too */
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| 68 | *ctx = talloc_move(mem_ctx, &a);
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| 69 |
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| 70 | status = NT_STATUS_OK;
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| 71 |
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| 72 | done:
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| 73 | if (!NT_STATUS_IS_OK(status)) {
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| 74 | TALLOC_FREE(a);
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| 75 | }
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| 76 |
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| 77 | return status;
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| 78 | }
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| 79 |
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| 80 | NTSTATUS ntlmssp_server_step(struct auth_ntlmssp_state *ctx,
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| 81 | TALLOC_CTX *mem_ctx,
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| 82 | DATA_BLOB *token_in,
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| 83 | DATA_BLOB *token_out)
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| 84 | {
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| 85 | NTSTATUS status;
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| 86 |
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| 87 | /* this has to be done as root in order to verify the password */
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| 88 | become_root();
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| 89 | status = auth_ntlmssp_update(ctx, *token_in, token_out);
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| 90 | unbecome_root();
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| 91 |
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| 92 | /* put the output token data on the given mem_ctx */
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| 93 | talloc_steal(mem_ctx, token_out->data);
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| 94 |
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| 95 | return status;
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| 96 | }
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| 97 |
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| 98 | NTSTATUS ntlmssp_server_check_flags(struct auth_ntlmssp_state *ctx,
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| 99 | bool do_sign, bool do_seal)
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| 100 | {
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| 101 | if (do_sign && !auth_ntlmssp_negotiated_sign(ctx)) {
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| 102 | DEBUG(1, (__location__ "Integrity was requested but client "
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| 103 | "failed to negotiate signing.\n"));
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| 104 | return NT_STATUS_ACCESS_DENIED;
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| 105 | }
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| 106 |
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| 107 | if (do_seal && !auth_ntlmssp_negotiated_seal(ctx)) {
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| 108 | DEBUG(1, (__location__ "Privacy was requested but client "
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| 109 | "failed to negotiate sealing.\n"));
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| 110 | return NT_STATUS_ACCESS_DENIED;
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| 111 | }
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| 112 |
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| 113 | return NT_STATUS_OK;
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| 114 | }
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| 115 |
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| 116 | NTSTATUS ntlmssp_server_get_user_info(struct auth_ntlmssp_state *ctx,
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| 117 | TALLOC_CTX *mem_ctx,
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| 118 | struct auth_serversupplied_info **session_info)
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| 119 | {
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| 120 | NTSTATUS status;
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| 121 |
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| 122 | status = auth_ntlmssp_steal_session_info(mem_ctx, ctx, session_info);
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| 123 | if (!NT_STATUS_IS_OK(status)) {
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| 124 | DEBUG(1, (__location__ ": Failed to get authenticated user "
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| 125 | "info: %s\n", nt_errstr(status)));
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| 126 | return status;
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| 127 | }
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| 128 |
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| 129 | DEBUG(5, (__location__ "OK: user: %s domain: %s workstation: %s\n",
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| 130 | auth_ntlmssp_get_username(ctx),
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| 131 | auth_ntlmssp_get_domain(ctx),
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| 132 | auth_ntlmssp_get_client(ctx)));
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| 133 |
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| 134 | return NT_STATUS_OK;
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| 135 | }
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